废炭基钯催化剂中钯的绿色回收工艺研究  

Research on Green Recovery Process of Pd from Waste Pd/C Catalyst

作　　者：黄庆[1] 郁丰善 顾卫华[1] 王临才[1] 丁国栋 李永敏 HUANG Qing;YU Fengshan;GU Weihua;WANG Lincai;DING Guodong;LI Yongmin(School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Jiangxi Han's Precious Metals Go.,Ltd.,Shangrao 335500,China)

机构地区：[1]上海第二工业大学资源与环境工程学院,上海201209 [2]江西省汉氏贵金属有限公司,江西上饶335500

出　　处：《中国资源综合利用》2021年第11期1-5,16,共6页China Resources Comprehensive Utilization

基　　金：上海市科委科普项目(21DZ2304300);江西省主要学科学术和技术带头人培养计划项目(20194BCJ22027);江西省首届双千计划培养类高端科技创新人才项目(jxsq2019201113)。

摘　　要：废炭基钯催化剂在石油化工、医药化工催化领域应用广泛,在钯资源相对短缺的情况下,从废炭基钯催化剂中绿色高效回收贵金属钯意义重大。本文提出利用嗜酸氧化亚铁硫杆菌(简称A.f菌)预处理联合绿色化学氧化技术提取废炭基钯催化剂中的钯。结果表明,预处理最佳工艺如下:七水合硫酸亚铁添加量为0.02 g/mL,固液比为2∶50,A.f菌接种量为10%,摇床转速为130 r/min,温度为30℃,废炭基钯催化剂中杂质金属被有效去除。绿色化学氧化最佳工艺如下:反应温度为70℃,反应时间为1.5 h,双氧水添加量为5%,氯化钠添加量为20%,硫酸氢钠添加量为10%,钯浸出率均超过99.7%。Waste Pd/C catalysts are widely used in the field of petrochemical and pharmaceutical chemical catalysis,with the relative shortage of Pd resources,green and efficient recovery of precious metal Pd from waste Pd/C catalysts is of great significance.This paper proposes the use of Acidithiobacillus ferrooxidans(abbreviated as A.f bacteria)pretreatment combined with green chemical oxidation technology to extract Pd from waste Pd/C catalysts.The results showed that the best pretreatment process was as follows:the addition amount of ferrous sulfate heptahydrate is 0.02 g/mL,the solid-liquid ratio is 2∶50,the A.f bacteria inoculation amount is 10%,the rotating speed of the shaker is 130 r/min,the temperature is 30℃,and the impurity metal in waste Pd/C catalysts is effectively removed.The best process for green chemical oxidation is as follows:the reaction temperature is 70℃,the reaction time is 1.5 h,the addition of hydrogen peroxide is 5%,the addition of sodium chloride is 20%,the addition of sodium bisulfate is 10%,and the Pd leaching rate exceeds 99.7%.

关 键 词：钯炭催化剂 钯 嗜酸氧化亚铁硫杆菌 生物浸出 绿色化学氧化 

分 类 号：X705[环境科学与工程—环境工程]